From Prayers of an Excellent Wife by Andrew Case:
If you want to be an excellent wife, far more precious than jewels, pray for your husband. If you want to do him good, and not harm, all the days of your life, pray for him. If you desire to be a wife whose husband is “known in the gates when he sits among the elders of the land,” pray for him. If you open your mouth with wisdom, may it be full of wise prayers for your husband. Let not charm or fleeting beauty distract you from this vital task. The fruit of wise prayers will be better for him than the fruit of your hands. When it comes to this loving labor, may you never be found eating the bread of idleness.
You have submitted yourself to the leadership of a mortal man with a sinful heart, therefore intercede all the more for him. He is your head, but his head is Christ, and the head of Christ is God (I Cor 11:3), and you have been given privileged access to Him through Jesus. Therefore never tire in lifting your husband up to God to be led in righteousness so that he might turn and lead you in the same. And when you do pray, use God’s Word. O what a treasure trove of prayer is afforded to us in the Bible! Seize its wisdom of petition and exultation, and learn to be a conduit of its perfect intercession, entrusting your husband to his Maker, the Supreme Ruler of all the world.